Two-Parameter Optical Fiber Sensor Using Photopolymer Microtips

IF 4.3 2区 综合性期刊 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC
Yu Zhang;Jiangnan Zhao;Zhuo Ren;Yifan Qin;Zhihai Liu
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Abstract

We propose and develop a two-parameter optical fiber sensor based on photopolymer microtips, which may measure both refractive index (RI) and temperature simultaneously. We fabricate the sensor by growing two microtips on the end face of a twin-core fiber (TCF) and launch two beams of supercontinuous laser source with a wide spectral range into two cores independently. One microtips works as an RI sensing unit. The laser entering into the microtip will produce multimode interference (MMI), and the interference spectrum will shift along with the environmental RI. The other microtip works as a temperature-sensing unit. To improve the temperature sensitivity, we coat a layer of polydimethylsiloxane (PDMS) on the surface of the microtip. We receive the reflective spectrum with two overlapped MMIs, separate the spectrum by using the fast Fourier transform (FFT) method, and finally, realize the independent detection of the two parameters. Experimental results show that the RI sensitivity is −274 nm/RIU with the range of $1.33\sim 1.413$ RIU, while the temperature sensitivity is 1.188 nm/°C with the range of 10 °C–90 °C. In practical application, we construct a matrix equation with the testing sensitivity to solve the crosstalk between two parameters. The proposed two-parameter optical fiber sensor, featuring the benefits of low cost, easy manufacturing, and simplicity of structure, can find potential application prospects in various areas such as industry, environment, and medicine.
采用光聚合物微针尖的双参数光纤传感器
提出并研制了一种基于光聚合物微针尖的双参数光纤传感器,该传感器可以同时测量折射率和温度。我们通过在双芯光纤(TCF)的端面上生长两个微针尖来制造传感器,并将两束具有宽光谱范围的超连续激光源分别发射到两个芯中。一个微针尖作为RI传感单元。激光进入微针尖后会产生多模干涉(MMI),干涉光谱会随着环境的RI发生偏移。另一个微尖作为温度传感单元。为了提高温度敏感性,我们在微针尖表面涂覆了一层聚二甲基硅氧烷(PDMS)。利用两个重叠的mmi接收反射光谱,利用快速傅里叶变换(FFT)方法对光谱进行分离,最后实现两个参数的独立检测。实验结果表明,RI灵敏度为- 274 nm/RIU,范围为1.33 ~ 1.413$ RIU,温度灵敏度为1.188 nm/°C,范围为10°C ~ 90°C。在实际应用中,我们构造了一个带有测试灵敏度的矩阵方程来求解两个参数之间的串扰。本文提出的双参数光纤传感器具有成本低、制造方便、结构简单等优点,在工业、环境、医疗等各个领域具有潜在的应用前景。
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来源期刊
IEEE Sensors Journal
IEEE Sensors Journal 工程技术-工程:电子与电气
CiteScore
7.70
自引率
14.00%
发文量
2058
审稿时长
5.2 months
期刊介绍: The fields of interest of the IEEE Sensors Journal are the theory, design , fabrication, manufacturing and applications of devices for sensing and transducing physical, chemical and biological phenomena, with emphasis on the electronics and physics aspect of sensors and integrated sensors-actuators. IEEE Sensors Journal deals with the following: -Sensor Phenomenology, Modelling, and Evaluation -Sensor Materials, Processing, and Fabrication -Chemical and Gas Sensors -Microfluidics and Biosensors -Optical Sensors -Physical Sensors: Temperature, Mechanical, Magnetic, and others -Acoustic and Ultrasonic Sensors -Sensor Packaging -Sensor Networks -Sensor Applications -Sensor Systems: Signals, Processing, and Interfaces -Actuators and Sensor Power Systems -Sensor Signal Processing for high precision and stability (amplification, filtering, linearization, modulation/demodulation) and under harsh conditions (EMC, radiation, humidity, temperature); energy consumption/harvesting -Sensor Data Processing (soft computing with sensor data, e.g., pattern recognition, machine learning, evolutionary computation; sensor data fusion, processing of wave e.g., electromagnetic and acoustic; and non-wave, e.g., chemical, gravity, particle, thermal, radiative and non-radiative sensor data, detection, estimation and classification based on sensor data) -Sensors in Industrial Practice
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